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º®¿¡ ¼³Ä¡µÈ ¼±¹ÝÀ» ÁöÁöÇÏ´Â ÁöÁö·Â(¹Ý·Â, reaction force)

ÀÛ¼ºÀÚ Uploader : ¸¶Áß¹° ÀÛ¼ºÀÏ Upload Date: 2021-01-30º¯°æÀÏ Update Date: 2022-05-10Á¶È¸¼ö View : 562

Type1 Type2
±×¸²°ú °°ÀÌ ±æÀÌ°¡ L (m), º®¿¡ ¼³Ä¡µÈ ÁöÁöÁ¡ÀÇ ³ôÀÌ°¡ H (m) ÀÎ ¼öÆò¼±¹Ý¿¡ ºÐÆ÷ÇÏÁß w (N/m) °¡ ÀÛ¿ëÇÒ ¶§, ÁöÁöÁ¡ U, D ¿¡ ¹ß»ýÇÏ´Â ¹Ý·ÂÀ» ±¸ÇÑ´Ù.

UH, DH : U, D ÁöÁ¡ÀÇ ¼öÆò·Â (¡æ:+)
UV, DV : U, D ÁöÁ¡ÀÇ ¼öÁ÷·Â (¡è:+)

ÁöÁ¡ D ¿¡¼­ÀÇ ¸ð¸àÆ® ÇÕÀÌ 0 À̹ǷÎ,

(w*L)*(L/2) + UH*H = 0

UH = -(w*L^2)/(2*H)

°¡ µÇ°í, ¼öÆò¹æÇâÀÇ ÇÕ·ÂÀÌ 0 À̹ǷÎ,

UH + DH = 0

DH = -UH = (w*L^2)/(2*H)

°¡ µÈ´Ù.

D ÁöÁ¡¿¡¼­ÀÇ ¼öÁ÷·ÂÀº, L : H = DH : DV À̹ǷÎ,

DV = DH*H/L = (w*L^2)*H/(2*H*L) = (w*L)/2

ÀÌ µÇ°í, ¼öÁ÷·ÂÀÇ ÇÕÀÌ 0 À̹ǷÎ,

UV + DV = w*L

UV = w*L - (w*L)/2 = (w*L)/2

ÀÌ µÈ´Ù.
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